Catamaran boat



FIG. 1 is a perspective view of my design from the rear right side.

FIG. 2 is a reduced right side view thereof, the left side view being a mirror image of FIG. 2.

FIG. 3 is an enlarged front view thereof.

FIG. 4 is an enlarged rear view thereof; and,

FIG. 5 is a reduced bottom view thereof.

The broken lines are for the purpose of illustrating portions of the article that form no part of the claim. 

CLAIM The ornamental design for a catamaran boat, as shown and described. 